net.server_epoll: Add support for systemd socket activation
Allows creating listening sockets and accepting client connections
before Prosody starts.
This is unlike normal Prosody dynamic resource management, where ports
may added and removed at any time, and the ports defined by the config.
Weird things happen if these are closed (e.g. due to reload) so here we
prevent closing and ensure sockets are reused when opened again.
-- luacheck: ignore 212/self
local function new_simple_form(form, result_handler)
return function(self, data, state)
if state or data.form then
if data.action == "cancel" then
return { status = "canceled" };
end
local fields, err = form:data(data.form);
return result_handler(fields, err, data);
else
return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";
end
end
end
local function new_initial_data_form(form, initial_data, result_handler)
return function(self, data, state)
if state or data.form then
if data.action == "cancel" then
return { status = "canceled" };
end
local fields, err = form:data(data.form);
return result_handler(fields, err, data);
else
local values, err = initial_data(data);
if type(err) == "table" then
return {status = "error"; error = err}
elseif type(err) == "string" then
return {status = "error"; error = {type = "cancel"; condition = "internal-server-error", err}}
end
return { status = "executing", actions = {"next", "complete", default = "complete"},
form = { layout = form, values = values } }, "executing";
end
end
end
return { new_simple_form = new_simple_form,
new_initial_data_form = new_initial_data_form };